2026-04-18T06:10:47Zhttps://recercat.cat/oai/request

oai:recercat.cat:2445/132962025-12-04T20:48:35Zcom_2072_1057col_2072_478822col_2072_478917

00925njm 22002777a 4500 dc Wedekind, Jan author Hyvärinen, Antti-Pekka author Brus, David author Reguera, D. (David) author 2010-07-05T10:27:07Z 2010-07-05T10:27:07Z 2008 The influence of the pressure of a chemically inert carrier gas on the nucleation rate is one of the biggest puzzles in the research of gas-liquid nucleation. Experiments can show a positive effect, a negative effect, or no effect at all. The same experiment may show both trends for the same substance depending on temperature, or for different substances at the same temperature. We show how this ambiguous effect naturally arises from the competition of two contributions: nonisothermal effects and pressure-volume work. Our model clarifies seemingly contradictory experimental results and quantifies the variation of the nucleation ability of a substance in the presence of an ambient gas. Our findings are corroborated by molecular dynamics simulations and might have important implications since nucleation in experiments, technical applications, and nature practically always occurs in the presence of an ambient gas. Nucleació Química física Nucleation Physical chemistry and chemical physics Unraveling the "pressure effect" in nucleation